Skiving machine



May 22, 1928.

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E. E. LANE SKIVING MACHINE- Fild Feb. 24, 192 1- May 22, 1928.

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- EVE. LANE SKIVING MACHINE Fiied Feb. 24, 1921 1a Sheets-Sheet 1'7 May 22, 1928.

E. E. LANE SKIVING MACHINE Filed Feb.24, 1921 18 Sheets-Sheet 1e Patented May 22, 192 8.

UNITED STATES:

PATENT oF'l-IcE; 1

ELMER 1!. LANE, OI DANVEBS, MASSACHUSETTS, ASSIGNOR TO HARRY E. 0F BROOKLINE, MASSACHUSETTS. A

SKIVING MACHINE.

Application filed February 24, 1921. Serial No. 447,884.

This invention relates to machines for skiving ,stifl'eners for footwear, such for example as toe boxes, counter stlfleners or other equivalent parts. While the machine, which I have illustrated on the 'accompanying drawings as embodying my invention, is applicable for use in skiving leather blanks, yet I have had in mind to produce one which is especially applicable for use in connection with blanks of a fibrous material saturated or coated with a waterproof stiffening agent. In accomplishing this result, I employ an endless band knife located close to the nip of a pair of rolls, of which one is recessed to receive the body of the blank and the other is of a yielding character, so that those portions of the blank which are not forced into the recess are skived and removed by the knife. In addition to these elements or instrumentalities, I provide a novel feeding mechanism by which the blanks are fed successively to the rolls, and are squared or trued, so that they may be accurately positioned in reference to the cavity in the recessed roll. :As will be explained, this feeding mechanism is manually controlled so that it may be thrown into and out of operation without affecting the rotation of the rolls or the travel of the band knife. In addition to these features, my invention includes numerous others, which I shall subsequently describe in the following specification and set forth in the appended claims. t

On the accompanying drawing,-

Figure 1 represents in front elevation a;

skiving machine embodying my invention.

Figure 2 represents a slde elevatlon of the same.

Figure 3 represents a vertical section through the same from front to rear, omltting the lower portion of the machine.

Figure 4 represents a section on the line 44 of Figure 3, and shows a portion of the mechanism for adjusting the band knife wheels.

Figure 5 represents a section on the line 'Fi'gure 6 represents a section on the line 6-6 of Figure 5.

Figure 7 represents a vertical section through the rolls on the line 7-7 of Figure 2.

Figure 8 represents a horizontal section on the line 88 of Figure 7, through the recessed roll, and shows the supplemental feed roll. it

Figure 9 represents a vertical section through the feed roll on the line 9-9 of Figure 8. Figure 10 is a tranverse vertical section through the main rolls, and illustrates a portion of the gearing for driving the sup plemental roll. r, i

Figure 11 is a diagrammatic view of the geialring for driving the supplemental feed r0 Figure 12 represents in section a spring for holding one end of the supplemental feed roll against the work. 4

Figures 13 and 14. represent sections Figure 20 illustrates in section the manually-operated mechanism for controlling the operation of the blank feeden Figure 21 (Sheet 4) shows the handle for said last-mentioned mechanism.

Figures 22 and 23 (Sheet 2) show a yielding connection in the mechanism for. operating the feed carriage.

Figure 24 represents a section on the lines 2424 of Figure 18, through the feed bars. j Figure 25 represents a section on the line 2525 of Figure 18, and shows a portion of the mechanism foractuating the feed bars,

by which a four-way motion is imparted "thereto. F

Figure 26 represents asimilar section with the parts in a different position.

us is vertically adjusted.

Figure 32 represents a vertical front to 6 rear section through a. portion ofthe machine, and shows the mechanism for adjust"- ingne of the grinding wheels horizontally. fore proceeding to a description in detail of the machine which. is illustrated by the drawings thusbriefly referred to, I desire to have it understood that the machine is but one of various different embodiments of which the invention is capable, that various features thereof may be changed without af fecting other features, and that the phrase- ,ology herein employed is for the purpose of description and not of limitation.

Of course, any suitable framework may be employed for supporting the operative instrumentalities. As shown, however, the main frame is shown as approximately cubical, and for conveniencecomprises an upper section 40 and a lower section 41, which are formed of castings bolted or otherwise rigidly secured together. The lower section comprises the four corner or angular uprights 42, with connecting webs 43, 44, 44,

45, at the front and rear sides respectively,

as best shown in Figures 1 and 2. The upper section 40 of the main frame su ports the feed mechanism, the band knife, t e coacting rolls and the other instrumentalities which deal with the blanks as they are skived and finished, and its construction will be described in the subsequent explanation of the machine.

The band knife.-As has been stated, I employ an endless band knif such as indicated at 46, and it is support by two large wheels or pulleys 47, 48, each of which has on its rim an upstandingperipheral flange 49, against which the rear or blunt edge of the band knife may bear, to assist in resisting the rearward thrust against the knife when the front cutting edge thereof is in engagement with the work. The pulleys are respectively secured upon shafts 50, 51,which are approximately in parallelism and which are journaled in anti-friction bearings located on brackets 52, 53. The bracket 52 may be formed separately and rigidly secured to the top section of the mam frame,

or it may be cast integrally therewith as shown in Figures 1 and 2, to afford the two spaced bearin 54, 55 for the pulley shaft 50. The bearings 54 and 55 are each provided with anti-friction balls 56, and races 57, 58, for holding the shaft against side thrusts. The bracket 53 is provided with like bearings for the shaft 51, but it is formed separately-from the frame andso secured thereto that it. is capable of adjustment, as will be explained, to effect a relative adjustment of the shaft 51 to the shaft 50 and maintain a proper tension on the band knife. The edge of the knife, as it is used, is worn away both by reason of its engagement with the work and of its being ground or sharpened, and consequently the width of the knife is reduced. Moreover, knives of different widths are used from time to time. Hence, as the operating portion of the edge of the knife must be accurately related to the nip of the rolls by -which-the blank to be skived is presented to it, I provide mechanism by which the knifesupporting shafts 50, 51 and pulleys 47 ,48, and the knife may all be adjusted simultaneously in lines longitudinal of said shafts and transverse to the path of movement of the knife. This mechanism comprises a shaft 59 which is journaled in a bracket 60 secured to the under face of the flat top plate 61 of the top section 40. of the main frame, as best shown in Figures 1 and 4. The front end of the shaft extends to the front of the frame and is squared to receive a wrench or crank by which it may be rotated in either direction. At its rear end, 'the shaft 59 is provided with a worm 62 which engages a case may be, may project. The under side of each slide is provided with a rack 67' with which intermeshes a gear segment 68 splined on the associated end of the shaft 64.

There is, of course, one of these segments on each end of the shaft 64 intermeshing with an associated slide 65, so that, as the adjusting shaft 59 is rocked in one direction or the other, the two slides will be moved longitudinally of the axes of the shafts 50 and 51 to the same extent and will be maintained in their adjusted position by reason of the engagement of the worm segment 63 with the worm 62 on the said shaft 59. Oncach of the shafts 50, 51,,there is a shoulder 69 and also a washer 70, the latter being held in 

